CVE-2026-105209: Zitadel

Critical severity, CVSS 9.6. EPSS: 0.2% chance of exploitation in the next 30 days.

ZITADEL 3.x before 3.4.15 and 4.x before 4.17.1 contains an improper authorization vulnerability: when issuing passkey or passwordless enrollment codes, it checks only the organization in the x-zitadel-orgid header, not the target user's organization. Attackers with user-write permission in one organization can obtain an enrollment code for a user in another organization on the same instance and register their own authenticator to take over that account.

Affected products

• Zitadel Zitadel: before 4.17.1 (fixed in 4.17.1); before 3.4.15 (fixed in 3.4.15)

Published 2026-10-04. Last modified 2026-10-05.